# b=['a','c','d']
# for i in b:
# 	print(i.title()+', that was a !')
# #print(i+" --") # i等于d

# print('think you')


# for x in range(1,5):
# 	print(x)

# m=list(range(1,6,2))
# print(m)

# s=[]
# for x in range(1,11):
# 	s.append(x**2)

# print(s)

# print(min(s))
# print(max(s))
# print(sum(s))

# s=[v**2 for v in range(1,11)]
# print(s)

# b=['a','c','d','g','56']
# # print(b[2:3])

# # print(b[-3:]) # 最后三个

# # for x in b[2:]:
# # 	print(x)

# c=b[:]
# c.append('23556')
# print(c)

# print(b)

# d=(2,3)
# print(d)

# d[0]=100 #元祖不能修改

